Mitotic figure of the CD34−, canine hematopoietic stem cell line D064 (Huss et al, Blood 85:2414, 1995 and Huss et al, Proc Natl Acad Sci USA 92:748, 1995). The spindle is attached to the condensed chromosomes, which are pulled apart by the centrioles. Original magnification ×10,000. (Courtesy of Ralf Huss, MD, Institute of Pathology, Ludwig-Maximilians-Universitat, Thalkirchner Strasse 36, Munich D-80337, Germany.)